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WO2006106364A2 - Ameliorations apportees a une operation de commutation dans des reseaux de distribution d'alimentation electrique - Google Patents

Ameliorations apportees a une operation de commutation dans des reseaux de distribution d'alimentation electrique Download PDF

Info

Publication number
WO2006106364A2
WO2006106364A2 PCT/GB2006/050077 GB2006050077W WO2006106364A2 WO 2006106364 A2 WO2006106364 A2 WO 2006106364A2 GB 2006050077 W GB2006050077 W GB 2006050077W WO 2006106364 A2 WO2006106364 A2 WO 2006106364A2
Authority
WO
WIPO (PCT)
Prior art keywords
switch
drive assembly
switch shaft
shaft
actuating member
Prior art date
Application number
PCT/GB2006/050077
Other languages
English (en)
Other versions
WO2006106364A3 (fr
Inventor
Glenn Smith
Original Assignee
Viserge Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Viserge Limited filed Critical Viserge Limited
Publication of WO2006106364A2 publication Critical patent/WO2006106364A2/fr
Publication of WO2006106364A3 publication Critical patent/WO2006106364A3/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/04—Levers
    • H01H3/06—Means for securing to shaft of driving mechanism
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/54—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
    • H01H3/58—Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using friction, toothed, or other mechanical clutch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/50—Manual reset mechanisms which may be also used for manual release
    • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever

Definitions

  • This invention relates to improvements in the operation of switches in electrical power distribution networks, eg switchgear in electrical power distribution substations or pole-mounted switches, and in particular to apparatus with which motor-driven operation of such switches may be overridden to permit manual operation.
  • the distribution of electrical power within the United Kingdom involves distribution networks operating at a number of voltages. Power is distributed from power stations at very high voltages, eg 40OkV, via overhead power lines. Further distribution then takes place through networks operating at intermediate voltages, typically 33kV or 11 kV, before the electricity is finally supplied to consumers at normal "mains" voltages of 240V (single phase) or 415V (three phase).
  • Intermediate voltage networks generally include substations that house switchgear to permit circuits connected to the substation to be switched ON or OFF. Such circuits may need to be switched OFF, for instance, to permit maintenance operations to be carried out or to isolate faults.
  • Switches may also be installed at other points in the distribution network, eg above ground on poles that support overhead power cables.
  • Switching of the circuit back to its original state would similarly require a return visit by the operator, again leading to delay.
  • systems have been developed that permit automated switching, the operations being controlled from a remote control centre.
  • such systems comprise electric motors capable of applying high torque to a switch shaft, thereby causing it to move from ON to OFF, or vice versa.
  • it may from time to time be necessary or desirable to override the automatic operation of the switch, eg in the event of malfunction or loss of power to the motor or a breakdown in the communication link to the remote control centre.
  • a drive assembly for a switch in an electrical power distribution network comprising a switch shaft mechanically coupled to a motor-driven actuating member by a clutch mechanism, whereby the switch shaft may be decoupled from the actuating member so as to permit manual operation of the switch.
  • the drive assembly according to the invention is advantageous primarily in that in normal operation the switch is operated under control of the motor, but the clutch mechanism enables the switch shaft to be rapidly and easily decoupled from the motor, thereby permitting manual operation of the switch, without the need to dismantle the assembly.
  • the drive assembly may form part of the original switch equipment, or may be supplied as a retrofit to existing, manually operable switchgear.
  • clutch mechanism is meant any mechanism by actuation of which the actuating member is decoupled from the switch shaft.
  • the clutch mechanism is most preferably a mechanical clutch assembly.
  • the switch shaft and the actuating member are preferably formed with cooperating formations that, when engaged, couple the switch shaft and actuating member together and cause rotation of the actuating member to rotate the switch shaft.
  • the switch shaft is provided with one or more projections that locate in a corresponding recess or recesses in the actuating member.
  • resilient means eg a compression spring, are provided to bias the switch shaft and the actuating member into the coupled condition.
  • the actuating member comprises a wheel or disc mounted about the switch shaft for rotation about the axis of the switch shaft.
  • the actuating member may consist of only a part, eg a segment, of such a disc or wheel.
  • the actuating member has a toothed rim that is engaged by a gear, most preferably a worm gear, that is driven by the motor.
  • the switch shaft should protrude from the drive assembly, the distal end of the switch shaft being formed for engagement with a suitable lever or handle by which the switch may be manually operated.
  • the switch shaft is preferably decoupled from the actuating member by depression of the distal end of the switch shaft, most preferably against the action of a compression spring mounted about the switch shaft.
  • the drive assembly most preferably includes means by which the angular position of the switch shaft, and hence the condition of the switch (OFF or ON) can be monitored.
  • the drive assembly therefore preferably includes sensors that are responsive to the angular position of the switch shaft.
  • Such sensors may take various forms.
  • the sensors are preferably of the electrical induction type, which generate a local electrical field and are sensitive to changes in that field due to the presence of electrically conducting material within that field.
  • at least one such sensor is positioned sufficiently close to the switch shaft to be sensitive to rotation of the switch shaft.
  • at least one electrically conducting projection is mounted on the switch shaft, such that rotation of the switch shaft causes the projection to move into and out of registration with the sensor.
  • two pairs of sensors and projections are provided, at a relative angular separation corresponding to the angular separation between the positions of the switch shaft when the switch is in the ON and OFF positions.
  • the two sensors are aligned, and the two projections are mounted on the switch shaft with such an angular separation.
  • an electrical power distribution network including a switch and drive assembly for the switch, the drive assembly being as described above.
  • the switch may be part of an electrical power distribution substation.
  • This is the most common form of switch to which the present invention is applicable, and so according to one specific aspect of the invention there is provided an electrical substation including a switch and a drive assembly for the switch, the drive assembly being as described above.
  • Figure 1 is a schematic side view of a switch drive assembly according to the invention, with the switch drive assembly in a normal, motor-driven operating condition;
  • Figure 2 is a sectional view on the line M-Il in Figure 1 ,;
  • Figure 3 is a fragmentary view of a clutch mechanism forming part of the switch drive assembly, in a manually overridden operating condition
  • Figure 4 is a sectional view on the line IV-IV in Figure 3.
  • a switch drive assembly according to the invention is generally designated 1.
  • the assembly 1 forms part of an 11 kV electrical power distribution substation, either as part of the original substation equipment or being retrofitted as a modification to an existing substation.
  • the assembly 1 comprises a housing 2 divided by an internal partition 4 into two compartments 6,8.
  • the housing 2 is fixed to the outer casing 10 of a switch assembly, through which casing 10 extends a switch drive shaft 12.
  • the switch assembly and switch shaft 12 may be of generally conventional form, save that the end of the switch shaft 12 is formed for engagement with the switch drive assembly 1 , specifically with a drive shaft 14 of the switch drive assembly 1 , as described in more detail below.
  • the right-hand (as viewed in Figure 1 ) compartment 8 of the housing 2 accommodates an electric motor 16.
  • the motor 16 may be of a type conventionally used in similar applications, ie to operate a switch of an electrical power distribution substation, and has a shaft 18 (see Figure 2) upon which is mounted a worm gear 20.
  • the worm gear 20 engages the toothed rim of a main drive wheel 22 that is mounted about a shaft 24.
  • One end of the shaft 24 is formed for engagement with the drive shaft 14 such that rotation of shaft 24 causes rotation of the drive shaft 14.
  • the end of the shaft 24 may be formed as a projection 23 of non-circular (eg hexagonal or square) cross-section, and the end of drive shaft 14 may be formed with a socket 13 of similar internal cross-section within which the end of the shaft 24 is received.
  • the shaft 24 extends through the left-hand (as viewed in Figure 1 ) compartment 6, and terminates, externally of the housing 2, in an end portion that is adapted for engagement with a suitable lever for manual operation of the switch.
  • the end portion may take the form of a socket 25 of non-circular (eg hexagonal or square) cross-section into which a corresponding part of a lever may be inserted.
  • a compression spring 26 is mounted about the shaft 24 and is captivated between the partition 4 and a spring shroud 28 that is fixedly mounted on the shaft 24.
  • the spring shroud 28 has the form of a cylinder that is open at the end closest to the partition 4, such that the spring 26 acts between the partition 4 and the internal face of the other end of the spring shroud 28.
  • Each sensor ring 30,32 may be fixed to the shaft 24 by means of one or more grub screws or the like (not shown) that occupy threaded bores in the sensor rings 30,32.
  • Each sensor ring 30,32 carries a metal lug 31 ,33 that cooperates with a corresponding sensor 34,36.
  • the sensors 34,36 are of the electrical induction type that generate a localised electrical field in the vicinity of the sensor, and are sensitive to modifications of that electrical field caused by the presence of electrically conducting material within that field.
  • the sensor rings 30,32 are positioned on the shaft 24 such that when the switch is in the OFF position, the metallic lug 31 of a first of the sensor rings 30 is disposed adjacent its corresponding sensor 34, while the metallic lug 33 of the other one of the sensor rings 32 is displaced from its corresponding sensor 36.
  • This is the condition shown in Figure 1. If the shaft 24 is rotated, in order to bring the switch to the ON condition, the lug 33 of the second sensor ring 32 is brought into proximity with the corresponding sensor 36, while the other lug 31 is rotated away from the corresponding sensor 34.
  • the main drive wheel 22 is mounted about the shaft 24.
  • the main drive wheel 22 is not fixedly mounted on the shaft 24. Instead, the shaft 24 passes through a central bore of the main drive wheel 2, the main drive wheel 22 being coupled to the shaft 24 by means of a coupling disc 38 that is fixed to the shaft 24.
  • the coupling disc 38 carries a pair of lugs 40 that locate in corresponding bores 41 in the main drive wheel 22.
  • the switch drive assembly 1 may be connected to a remote control centre by any suitable means, eg by cabling or by a wireless connection.
  • a suitable lever is engaged with the socket at the external end of the shaft 24.
  • the lugs 40 are displaced from the bores 41 in the main drive wheel 22, hence decoupling the shaft 24 from the drive wheel 22.
  • the shaft 24 can then be rotated manually, using the lever.
  • the extent to which the shaft 24 can be depressed inwardly is limited by the depth of the socket 13 at the end of the switch shaft 12.
  • rotation of the shaft 24 may be continued until the sensors 34,36 indicate that the desired condition has been reached.
  • manual rotation of the shaft may be continued simply until some other indication of switching is noticed (eg a change of state of the circuit controlled by the switch, or simply an audible noise that occurs on switching).

Landscapes

  • Mechanisms For Operating Contacts (AREA)

Abstract

L'invention concerne un ensemble d'entraînement destiné à un commutateur dans un réseau de distribution d'alimentation électrique et comprenant une tige de commutateur couplée de manière mécanique à un élément de commande entraîné par un moteur au moyen d'un mécanisme d'embrayage. La tige de commutateur peut être découplée de l'élément de commande, afin de permettre de faire fonctionner manuellement le commutateur.
PCT/GB2006/050077 2005-04-08 2006-04-04 Ameliorations apportees a une operation de commutation dans des reseaux de distribution d'alimentation electrique WO2006106364A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0507119.6 2005-04-08
GBGB0507119.6A GB0507119D0 (en) 2005-04-08 2005-04-08 Improvements relating to switch operation in electrical power distribution networks

Publications (2)

Publication Number Publication Date
WO2006106364A2 true WO2006106364A2 (fr) 2006-10-12
WO2006106364A3 WO2006106364A3 (fr) 2006-11-23

Family

ID=34586899

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/050077 WO2006106364A2 (fr) 2005-04-08 2006-04-04 Ameliorations apportees a une operation de commutation dans des reseaux de distribution d'alimentation electrique

Country Status (2)

Country Link
GB (2) GB0507119D0 (fr)
WO (1) WO2006106364A2 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034313A2 (fr) * 2008-09-24 2010-04-01 Linak A/S Servomoteur pour appareillage de commutation de systemes de distribution d'electricite de secteur
US8139345B2 (en) 2006-10-31 2012-03-20 Linak A/S Motor operator for switchgear for mains power distribution systems
CN102646552A (zh) * 2012-04-19 2012-08-22 无锡江南奕帆电力传动科技股份有限公司 断路器电、手动一体化离合装置
WO2012163354A1 (fr) 2011-05-31 2012-12-06 Linak A/S Actionneur
DE102011078575A1 (de) 2011-07-04 2013-01-10 Kries-Energietechnik Gmbh & Co.Kg Vorrichtung zur Lastschalterbetätigung
DE102014208211A1 (de) * 2014-04-30 2015-11-05 Siemens Aktiengesellschaft Übertragungsvorrichtung für einen Kompaktleistungsschalter zur Übertragung eines Drehmomentes und Betätigungsvorrichtung eines Kompaktleistungsschalters
KR101846220B1 (ko) * 2012-05-23 2018-04-06 엘에스산전 주식회사 조작기의 제동 장치

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011112365B3 (de) * 2011-09-02 2012-12-27 Maschinenfabrik Reinhausen Gmbh Stufenschalter mit Schneckengetriebe
DE102014110731A1 (de) * 2014-07-29 2016-02-04 Maschinenfabrik Reinhausen Gmbh Motorantrieb

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309478A (en) * 1941-08-05 1943-01-26 Gen Electric Operating mechanism
US4114465A (en) * 1976-12-06 1978-09-19 Vapor Corporation Modulating failsafe valve actuator using differential gearing
US4360720A (en) * 1980-01-23 1982-11-23 Hubert Laurenz Naimer Step switch
EP0237857A2 (fr) * 1986-03-14 1987-09-23 BBC Brown Boveri AG Dispositif d'entraînement pour un sectionneur électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5532660A (en) * 1991-06-28 1996-07-02 Square D Company Manual override mechanism for a remote controlled circuit breaker
US5397869A (en) * 1992-12-31 1995-03-14 Qesco International (Canada) Ltd. Electrical switch control device
US5861784A (en) * 1996-08-23 1999-01-19 Square D Company Manual override mechanism for a remote controlled circuit breaker
US5856642A (en) * 1996-09-20 1999-01-05 Inertia Engineering And Machine Works, Inc. Clutch coupled switch operator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309478A (en) * 1941-08-05 1943-01-26 Gen Electric Operating mechanism
US4114465A (en) * 1976-12-06 1978-09-19 Vapor Corporation Modulating failsafe valve actuator using differential gearing
US4360720A (en) * 1980-01-23 1982-11-23 Hubert Laurenz Naimer Step switch
EP0237857A2 (fr) * 1986-03-14 1987-09-23 BBC Brown Boveri AG Dispositif d'entraînement pour un sectionneur électrique

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8139345B2 (en) 2006-10-31 2012-03-20 Linak A/S Motor operator for switchgear for mains power distribution systems
WO2010034313A2 (fr) * 2008-09-24 2010-04-01 Linak A/S Servomoteur pour appareillage de commutation de systemes de distribution d'electricite de secteur
WO2010034313A3 (fr) * 2008-09-24 2010-07-08 Linak A/S Servomoteur pour appareillage de commutation de systemes de distribution d'electricite de secteur
CN102165547A (zh) * 2008-09-24 2011-08-24 利纳克有限公司 用于电源配电系统的开关设备的马达操作器
US8890017B2 (en) 2008-09-24 2014-11-18 Linak A/S Motor operator for switchgear for mains power distribution systems
WO2012163354A1 (fr) 2011-05-31 2012-12-06 Linak A/S Actionneur
US9281726B2 (en) 2011-05-31 2016-03-08 Linak A/S Actuator
DE102011078575A1 (de) 2011-07-04 2013-01-10 Kries-Energietechnik Gmbh & Co.Kg Vorrichtung zur Lastschalterbetätigung
DE102011078575B4 (de) * 2011-07-04 2013-01-31 Kries-Energietechnik Gmbh & Co.Kg Vorrichtung zur Lastschalterbetätigung
CN102646552A (zh) * 2012-04-19 2012-08-22 无锡江南奕帆电力传动科技股份有限公司 断路器电、手动一体化离合装置
KR101846220B1 (ko) * 2012-05-23 2018-04-06 엘에스산전 주식회사 조작기의 제동 장치
DE102014208211A1 (de) * 2014-04-30 2015-11-05 Siemens Aktiengesellschaft Übertragungsvorrichtung für einen Kompaktleistungsschalter zur Übertragung eines Drehmomentes und Betätigungsvorrichtung eines Kompaktleistungsschalters

Also Published As

Publication number Publication date
WO2006106364A3 (fr) 2006-11-23
GB0507119D0 (en) 2005-05-11
GB2424994A (en) 2006-10-11
GB0606748D0 (en) 2006-05-10

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